Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fishing impacts on the Great Barrier Reef

22.04.2015

New research shows that fishing is having a significant impact on the make-up of fish populations of the Great Barrier Reef.

It's long been known that environmental impacts such as climate change and pollution are amongst the drivers of change on the Great Barrier Reef.


Predatory fish are extremely important for maintaining a balanced ecosystem on the Great Barrier Reef.

Image: April Boaden

Now researchers from the ARC Centre of Excellence for Coral Reef Studies (Coral CoE) at James Cook University have found that removing predatory fish such as coral trout and snapper, through fishing, causes significant changes to the make-up of the reef's fish populations.

"A stable and healthy reef includes a high abundance and diversity of predatory fish and a relatively low number of herbivorous and small prey fish," says study lead author April Boaden, a PhD student at the Coral CoE.

"Predatory fish are extremely important for maintaining a balanced ecosystem on the reef, yet predators such as coral trout, snapper and emperor fish remain the main target for both recreational and commercial fishers," she says.

As part of the study, the researchers conducted extensive surveys of fish and their habitats at multiple sites across the Great Barrier Reef.

They compared fish communities in designated marine reserves (green zones), recreational fishing areas (yellow zones) and sites that allowed both commercial and recreational fishing (blue zones).

"We found that the fish communities on reefs differed greatly according to the level of fishing that they were subject to," Ms Boaden says.

"Predator numbers were severely depleted in heavily fished areas, while smaller prey fish such as damselfish, and herbivores such as parrotfish, had increased greatly in number having been released from predation."

The reduction in predator abundance through fishing altered the balance and structure of the coral reef ecosystem.

"Major disturbances such as cyclones, coral bleaching, climate change, Crown of Thorns Starfish and river run-off are thought to be the primary agents of change on the Great Barrier Reef," says study co-author, Professor Mike Kingsford from the Coral CoE.

"Despite this, we have demonstrated that great differences in the abundance of predatory reef fish, and of their prey, can be attributed to humans," Professor Kingsford says.

The findings support the continued and improved use of the existing marine networks on the Great Barrier Reef.

"The good news is that the data demonstrate that the current system of marine reserves on the Great Barrier Reef is effective in preserving predator numbers, and in doing so we can learn more about the processes affecting reefs in the face of multiple impacts," Professor Kingsford says.

"Fishing impacts are something that we can manage fairly easily compared to other threats such as climate change and run-off pollution, which are threatening the Great Barrier Reef," adds Ms Boaden.

###

Paper

Predators drive community structure in coral reef fish assemblages by A. E. Boaden and M.J. Kingsford is published in the journal Ecosphere.
http://www.esajournals.org/doi/full/10.1890/ES14-00292.1

Images

https://www.dropbox.com/sh/6jfuugnn02z5q5v/AADgemR9yrvPnxXXPzwMYsi-a?dl=0
(Images must carry photographer credits as listed in Dropbox.)

Contacts

April Boaden, Coral CoE, +61 (0) 458 565 194, april.boaden@my.jcu.edu.au

Professor Michael Kingsford, Coral CoE and School of Marine and Tropical Biology, James Cook University, michael.kingsford@jcu.edu.au

Eleanor Gregory, Coral Coe Media, + 61 (0) 428 785 895, eleanor.gregory@jcu.edu.au

Media Contact

Eleanor Gregory
eleanor.gregory@jcu.edu.au
61-042-878-5895

 @CoralCoE

http://www.coralcoe.org.au/ 

Eleanor Gregory | EurekAlert!

More articles from Life Sciences:

nachricht Flow of cerebrospinal fluid regulates neural stem cell division
22.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Chemists at FAU successfully demonstrate imine hydrogenation with inexpensive main group metal
22.05.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>